US5933677A - Method for processing paper jam error in image forming apparatus - Google Patents

Method for processing paper jam error in image forming apparatus Download PDF

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Publication number
US5933677A
US5933677A US08/838,593 US83859397A US5933677A US 5933677 A US5933677 A US 5933677A US 83859397 A US83859397 A US 83859397A US 5933677 A US5933677 A US 5933677A
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United States
Prior art keywords
paper
sheet
image forming
recording media
paper jam
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Expired - Lifetime
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US08/838,593
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English (en)
Inventor
Young-Seob Lee
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S Printing Solution Co Ltd
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Samsung Electronics Co Ltd
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Assigned to SAMSUNG ELECTRONICS CO., LTD., A CORPORATION OF THE REPUBLIC OF KOREA reassignment SAMSUNG ELECTRONICS CO., LTD., A CORPORATION OF THE REPUBLIC OF KOREA ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: LEE, YOUNG-SEOB
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Publication of US5933677A publication Critical patent/US5933677A/en
Assigned to S-PRINTING SOLUTION CO., LTD. reassignment S-PRINTING SOLUTION CO., LTD. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: SAMSUNG ELECTRONICS CO., LTD
Anticipated expiration legal-status Critical
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    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G15/00—Apparatus for electrographic processes using a charge pattern
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G15/00—Apparatus for electrographic processes using a charge pattern
    • G03G15/50—Machine control of apparatus for electrographic processes using a charge pattern, e.g. regulating differents parts of the machine, multimode copiers, microprocessor control
    • G03G15/5012—Priority interrupt; Job recovery, e.g. after jamming or malfunction
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G15/00—Apparatus for electrographic processes using a charge pattern
    • G03G15/70—Detecting malfunctions relating to paper handling, e.g. jams
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G2215/00—Apparatus for electrophotographic processes
    • G03G2215/00362—Apparatus for electrophotographic processes relating to the copy medium handling
    • G03G2215/00535—Stable handling of copy medium
    • G03G2215/00548—Jam, error detection, e.g. double feeding

Definitions

  • the present invention relates to an image forming apparatus using an electrophotographic developing process, and more particularly, relates to a method for processing paper jam error upon occurrence of paper jam in an image forming apparatus.
  • Electrophotographic developing processes are widely used in computer printers, facsimile machines and photocopiers in order to produce images on recording media in response to video signals.
  • a common example of an electrophotographic printing apparatus is a laser beam printer which prints images on individual sheets of paper through a series of electrostatic image-forming steps.
  • the process of electrostatic image forming includes charging a photosensitive drum to a substantially uniform potential so as to sensitize the surface thereof. The charged portion of the photosensitive drum is exposed to a light image to record an electrostatic latent image on its surface. The latent image is then developed by applying toner from a developing unit onto the photosensitive drum which is subsequently transferred and fixed on a recording medium. When a toner image is fixed on a recording medium, the toner image is first heated and fused onto the recording medium, and then naturally cooled so that it is fixed onto the recording medium.
  • Paper jams occur mainly due to paper feed failure, state damage of printing papers, jamming or sliding the papers in a specific portion of a paper conveyance path, and trouble of assemblies disposed in the paper conveyance path.
  • the image forming apparatus detects the paper jam error, and then processes the detected paper jam error by stopping the current printing operation and informing a user of occurrence of the paper jam error with visual message and an auditory message. Examples of conventional jam detection and recovery schemes are disclosed in U.S. Pat. No. 4,395,111 for Sheet Conveying Device issued to Takahashi et al., U.S. Pat No.
  • Paper jam error is generally classified with three categories depending on where the paper jam error is generated, e.g. the feeding and conveying of paper, or the transferring of paper, or the fixing and discharging of paper.
  • a first error is generated upon feeding the paper
  • a second error is generated upon transferring the papers
  • a third error is generated upon fixing and discharging the papers.
  • the first error is referred to as "jam 0", the second error "jam 1", and the third error "jam 2".
  • the jam "0" is generated by paper feed failure when the papers are not normally fed or conveyed from a paper cassette into an image forming device. Usually, the paper feed failure occurs when paper is not picked up from the paper cassette.
  • the image forming apparatus When jam "0" of the paper jam error is generated during consecutive printing operations, the image forming apparatus still performs the previous printing operation. In this situation, the typical image forming apparatus processes the paper jam error, and as a result, even the previous printing operation is interrupted.
  • the consecutive printing operations are performed and the previous printing paper is referred to as a paper preceding a paper to be fed currently.
  • the image forming apparatus feeds a next paper before the preceding paper is wholly discharged, so that in case of a jam "0", the printing operation on the previous printing paper can not be completed. Therefore, the user must reprint not only the paper where the paper jam error occurs but also the preceding paper before the current paper to be fed for the current image formation.
  • an image forming apparatus and a process of processing a paper jam error which includes the steps of: determining when a paper jam occurs due to a paper feed failure of a current sheet of paper while the image forming apparatus performs successive image forming operations on successive sheets of paper; and when the paper jam occurs due to the paper feed failure of the current sheet of paper, completing an image forming operation of an immediately preceding sheet of paper, and then clearing or otherwise processing the paper jam attributable to the paper feed failure of the current sheet of paper.
  • FIG. 1 illustrates an exemplary laser beam printer using an electrophotographic process
  • FIG. 2 is a block diagram of the exemplary laser beam printer
  • FIG. 3 is a flow chart illustrating steps of processing of a paper jam error according the present invention.
  • the laser beam printer includes a charging unit 100, a photosensitive drum 102, a laser scanner unit 104, a developing unit 106, a paper cassette 108, pick-up roller 110, a pair of conveying rollers 112, a pair of registration rollers 114, a transfer unit 116, a fixing unit 118 comprising a pair of coactive rollers which consists of a fuser roller and a pressure roller, and a pair of discharge rollers 120 and 122 for ejecting papers outside of the printer from a paper conveyance path 124.
  • the charging unit 100 creates a uniform static electric charge on the outer surface of the photosensitive drum 102.
  • the laser scanner unit 104 generates a laser beam L corresponding to a time-serial electrical pixel signal of image information input from an original image reading unit (not illustrated), and traces the image on the outer surface of photosensitive drum 102, so as to create a latent image on the surface of the photosensitive drum 102.
  • the latent image is converted to a toner image by the developing unit 106.
  • the electrophotographic process begins when the pickup roller 110, picks up the uppermost sheet of paper S loaded in the paper cassette 108.
  • the conveyor roller 112 conveys the paper to registration rollers 114, where the paper is aligned.
  • a transfer charge is applied to the outer surface of the photosensitive drum 102 by the transfer unit 116, to transfer the toner image onto the paper.
  • the cleaner removes any residual toner on the surface of the photosensitive drum 102, and the fixing unit 118 fuses the toner image to the paper.
  • the fixing unit 108 includes a fuser roller and a pressure roller. Fuser roller is heated by a heat lamp to fuse the toner image to the paper S.
  • the laser beam printer as shown in FIG. 1 also has sensors which monitor the operating state of the printer such as the paper conveyance state, the opening or the closing of the printer's cover. Sensors S1 to S2 are installed to monitor the paper conveyance state.
  • the first sensor S1 is located in the paper path between conveyor roller 112 and registration rollers 114 to monitor the status of the paper that is transferred to registration rollers 114.
  • the second sensor S2 is mounted in the paper conveyance path 124 between the fixing unit 118 and paper discharge rollers 120 and 122 to monitor the state of paper discharged to the output tray (not illustrated).
  • FIG. 3 is a block diagram of a laser beam printer using an electrophotographic process according to the principles of the present invention.
  • the laser beam printer includes a video control unit 200, a print engine unit 204, and an operation panel OPE 202.
  • Video control unit 200 includes a computer interface 206, an image processing unit 208, and an engine interface 210.
  • Computer interface 206 is connected between a host computer and image processing unit 208 for transferring input/output signals.
  • Video control unit 200 converts data from computer interface 206 into image data so that it can be processed by printer engine unit 204.
  • Image processing unit 208 includes a read-only-memory (ROM) containing a control program and a random-access-memory (RAM) for temporarily storing various data produced by the host computer and OPE 202.
  • Image processing unit 208 converts input data received by computer interface 206 into image data which can be processed by printer engine unit 204 according to the operating program, and then sends the converted image data to the printer engine unit 204.
  • Engine interface 210 which is connected between image processing unit 208 and printer engine unit 204, transfers input/output (I/O) signals to and from printer engine unit 204 under the control of image processing unit 208.
  • the OPE 202 is equipped with a set of input keys through which control commands that are sent to the printer, and a display unit for providing a visual display of status information during the printing operation, including a visual display of the paper jam when the paper jam error is generated.
  • Printer engine unit 204 includes a video interface 212, an engine controller 214, an input/output (I/O) interface 216, a sensor circuit 218, a mechanism driving unit 220, and an electrophotographic developing unit 222, and is connected to video control unit 200.
  • Video interface 212 links video control unit 204 with engine controller 214.
  • engine controller 214 Under the control of image processing unit 208, engine controller 214 has control over the mechanism driving unit 220 and electrophographic developing unit 222, and prints images corresponding to the image data from video control unit 204.
  • the engine controller 214 monitors for operating failures which occur in the printer engine unit 204 such as paper feeding, paper conveyance, etc. with the sensor circuit 218.
  • the I/O interface 216 is connected between the engine controller 214, the sensor circuit 218, the mechanism driving unit 220, and the electrophotographic developing unit 222 in order to link the engine controller 214 with the sensor circuit 218, the mechanism driving unit 220 and the electrophotographic developing unit 222.
  • the sensor circuit 218 controls sensors which monitor the operating state of each of the components, the paper conveyance state, and the amount of toner, and transmits output signals of the sensors to engine controller 214.
  • the mechanism driving unit 220 actuates various operating components of the laser beam printer used for paper feeding, paper conveyance, and printing operation.
  • Developing unit 222 prints images under the control of engine controller 214.
  • the engine controller 214 upon printing operation, the engine controller 214 detects jam "0", jam "1", and jam "2" by the detection signals of the sensors S1 and S2. That is, although the printing papers are successively fed, the jam "0" is generated if a paper is not conveyed from the paper cassette 108 to the first sensor S1 within a given time. After that, if the paper is not ejected from the first sensor S1 or not conveyed or ejected to/from the second sensor S2, the engine controller 214 determines that the paper is abnormally conveyed in the printer. Then, either jam "1" or jam "2" is generated.
  • jam "0” is mostly generated each time the paper is not picked up from the paper cassette 108. Therefore, in case of generation of jam "0", if an engine driving motor (not shown) for driving various rollers of the printer as shown in FIG. 1 is continuously driven to perform consecutive printing operations, the previous printing operation is performed with no problem. Nevertheless, the printer stops performing even the printing operation of the preceding sheet of paper.
  • FIG. 3 illustrates processing paper jam error according to the principles of the present invention.
  • the control unit 208 transmits a print command to the print engine 204 and begins a printing operation at step 300.
  • the engine controller 214 starts feeding individual sheet of paper stacked in the paper cassette 108 in response to input of the print command at step 302.
  • the engine controller 214 checks whether a paper is normally fed into the printer at steps 304 and 306. That is, the engine controller 214 determines whether the paper reaches to the first sensor S1 at step 304.
  • the engine controller 214 determines at step 308 that there is a preceding sheet of paper existed in the printer, the engine controller 214 performs the printing operation of the preceding sheet of paper at step 310, stops the printing operation of the current sheet of paper where paper jam is generated and processes the paper jam error at step 312. After that, the engine controller 214 ends all of the printing operations. However, when checked at step 308 that the preceding sheet of paper did not exist, the engine controller 214 proceeds to step 312, so that all of the printing operations can be stopped, thereby processing the paper jam error.
  • the present invention is capable not only of providing the convenience to the user but also of preventing the consumption of the unnecessary papers.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Control Or Security For Electrophotography (AREA)
  • Accessory Devices And Overall Control Thereof (AREA)
  • Paper Feeding For Electrophotography (AREA)
  • Controlling Sheets Or Webs (AREA)
US08/838,593 1996-04-10 1997-04-10 Method for processing paper jam error in image forming apparatus Expired - Lifetime US5933677A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR96-10826 1996-04-10
KR1019960010826A KR100256608B1 (ko) 1996-04-10 1996-04-10 화상형성장치의 용지 잼 에러 처리방법

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US08/838,593 Expired - Lifetime US5933677A (en) 1996-04-10 1997-04-10 Method for processing paper jam error in image forming apparatus

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US (1) US5933677A (ko)
EP (1) EP0801336A3 (ko)
JP (1) JPH1031336A (ko)
KR (1) KR100256608B1 (ko)
CN (1) CN1168990A (ko)

Cited By (14)

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US6236450B1 (en) * 1998-09-18 2001-05-22 Toshiba Tec Kabushiki Kaisha Document feeding method for automatic document feeder
US20030151764A1 (en) * 2002-02-14 2003-08-14 Oki Data Corporation Image recording apparatus
US6701095B1 (en) * 1999-01-08 2004-03-02 Ricoh Company, Ltd. Office information system having a device which provides an operational message of the system when a specific event occurs
US20040071475A1 (en) * 1998-02-02 2004-04-15 Mayumi Ohori Image forming apparatus
US20040114945A1 (en) * 2002-08-16 2004-06-17 Tatsuya Takagi Printing method of printer apparatus
US20040213590A1 (en) * 2003-04-28 2004-10-28 Schroath Leonard T. Printing device and method for locating a media jam
US6879372B1 (en) * 1997-01-31 2005-04-12 Canon Kabushiki Kaisha Image processing apparatus and method thereof
US20070025751A1 (en) * 2005-07-29 2007-02-01 Canon Kabushiki Kaisha Fixing apparatus and image forming apparatus
US20070086794A1 (en) * 2005-09-06 2007-04-19 Canon Kabushiki Kaisha Image forming system
US20070297816A1 (en) * 2006-06-26 2007-12-27 Konica Minolta Business Technologies, Inc. Image forming apparatus and control method thereof
US20080247797A1 (en) * 2007-04-05 2008-10-09 Fuji Xerox Co., Ltd. Recording Medium Deburring Apparatus and Image Forming Apparatus
US20090136278A1 (en) * 2007-11-27 2009-05-28 Xerox Corporation Paper edge-beveling method, and an image forming device including the same
US20110211898A1 (en) * 2010-02-26 2011-09-01 Canon Kabushiki Kaisha Printing apparatus and control method of printing apparatus
US10889134B2 (en) 2018-02-08 2021-01-12 Canon Kabushiki Kaisha Printing apparatus

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Publication number Priority date Publication date Assignee Title
KR100553870B1 (ko) * 1999-01-07 2006-02-24 삼성전자주식회사 인쇄기의 용지 공급에러 처리방법
JP3526032B2 (ja) 2000-11-08 2004-05-10 日本電気株式会社 モバイルネットワーク及びｉｐパケットの転送方法
KR100677607B1 (ko) * 2005-08-11 2007-02-02 삼성전자주식회사 화상형성장치
JP5599107B2 (ja) * 2011-04-11 2014-10-01 京セラドキュメントソリューションズ株式会社 画像形成装置及び給紙装置
JP5825275B2 (ja) * 2013-02-01 2015-12-02 コニカミノルタ株式会社 画像形成装置、画像形成システム及び画像形成制御方法

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Cited By (28)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6879372B1 (en) * 1997-01-31 2005-04-12 Canon Kabushiki Kaisha Image processing apparatus and method thereof
US20040071475A1 (en) * 1998-02-02 2004-04-15 Mayumi Ohori Image forming apparatus
US6898383B2 (en) * 1998-02-02 2005-05-24 Ricoh Company, Ltd. Image forming apparatus
US6236450B1 (en) * 1998-09-18 2001-05-22 Toshiba Tec Kabushiki Kaisha Document feeding method for automatic document feeder
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US20030151764A1 (en) * 2002-02-14 2003-08-14 Oki Data Corporation Image recording apparatus
US7965951B2 (en) 2002-02-14 2011-06-21 Oki Data Corporation Image recording apparatus having a lower fixing temperature
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US20070025751A1 (en) * 2005-07-29 2007-02-01 Canon Kabushiki Kaisha Fixing apparatus and image forming apparatus
US7437085B2 (en) * 2005-07-29 2008-10-14 Canon Kabushiki Kaisha Fixing apparatus and image forming apparatus
US20070086794A1 (en) * 2005-09-06 2007-04-19 Canon Kabushiki Kaisha Image forming system
US8200103B2 (en) * 2005-09-06 2012-06-12 Canon Kabushiki Kaisha Image forming system
US20070297816A1 (en) * 2006-06-26 2007-12-27 Konica Minolta Business Technologies, Inc. Image forming apparatus and control method thereof
US20080247797A1 (en) * 2007-04-05 2008-10-09 Fuji Xerox Co., Ltd. Recording Medium Deburring Apparatus and Image Forming Apparatus
US20090136278A1 (en) * 2007-11-27 2009-05-28 Xerox Corporation Paper edge-beveling method, and an image forming device including the same
US8285190B2 (en) * 2007-11-27 2012-10-09 Xerox Corporation Paper edge-beveling method, and an image forming device including the same
US20110211898A1 (en) * 2010-02-26 2011-09-01 Canon Kabushiki Kaisha Printing apparatus and control method of printing apparatus
US8430586B2 (en) * 2010-02-26 2013-04-30 Canon Kabushiki Kaisha Printing apparatus and control method of printing apparatus
US10889134B2 (en) 2018-02-08 2021-01-12 Canon Kabushiki Kaisha Printing apparatus

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EP0801336A2 (en) 1997-10-15
EP0801336A3 (en) 1998-05-13
KR100256608B1 (ko) 2000-05-15
KR970071162A (ko) 1997-11-07
CN1168990A (zh) 1997-12-31
JPH1031336A (ja) 1998-02-03

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